<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <form action="">

        <meta name="author" content="bnbbs">
        <meta name="description" content="这是一个HTML5页面">
        <meta name="keywords" content="html5,css3,响应式">
        <meta name="generator" content="sublime" text 3> 
        
        <meta charset="utf-8">
        <meta http-equiv="refresh" content="5;">
        <meta http-equiv="content-type" content="text/html charset=utf-8">

        <p id="abc">段落</p>
        <p class="abc">段落</p>
        <p class="abc">段落</p>
        <p class="abc">段落</p>

    </form>
    <form action="">
            <input type="text" name="user" accesskey="n">
            <p contenteditable="ture">我可以修改吗</p>
        <p dir="rtl">文字到右边了</p>
        <p hidden>文字到右边了</p>
        <p lang="en">HTML5</p>
        <p title="HTML5教程">HTML5</p>
        <input type="text" name="user" tabindex="2">
        <input type="text" name="user" tabindex="1">
        <p style="color: red;">css样式</p>
    </form>
</body>
</html>